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          <h1 class="post-title" itemprop="name headline">APNS统计分析</h1>
        

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        <p>最近有个业务是设备需要呼叫手机，要求手机在后台的情况下，也要接收到来电；iPhone手机在后台也能响应呼叫，应该就只有VOIP和推送了。VOIP是指手机后台化之后，系统会维持一条与服务器的长连接，当设备呼叫手机端时，服务器往手机发送一条呼叫指令，系统接收到呼叫指令后，会唤醒应用并执行相应代码，并本地推送. 推送是指通过APNS推送呼叫信息到手机，手机展现远程推送.关于VOIP，发现失败率挺高的，与想通过APNS实现，那么首要的工作就是对APNS的推送到达率和实时性需要做个测试，这里记录推送的统计过程.</p>
<h3 id="统计方式"><a href="#统计方式" class="headerlink" title="统计方式"></a>统计方式</h3><p>这里采取的是通过抓包来获取推送时间，抓包的话就必须了解APNS推送的端口信息，通过<a href="https://support.apple.com/zh-cn/HT203609" target="_blank" rel="noopener">苹果官网</a>可以知道</p>
<pre>
TCP 端口 5223：用于与 Apple 推送通知服务 (APNs) 通信
TCP 端口 2195：用于向 APNs 发送通知
TCP 端口 2196：用于 APNs 反馈服务
TCP 端口 443：设备无法在端口 5223 上与 APNs 通信时，仅在 Wi-Fi 上备用
</pre>
一般是在5223上抓包就可以，也有发现是需要在443才能抓到.这里主要对5223进行抓包.另外推送都是来自17.0.0.0/8服务器

* 发送端 - 通过java-apns来往APNS发送推送
<pre>
java -cp .:../lib/apns-0.1.5-jar-with-dependencies.jar:../lib/log4j-1.2.12.jar:../lib/slf4j-log4j12-1.7.13.jar Pusher 10 20> send_org.log
</pre>
* 接收端 - 通过rvictl映射手机的网卡到rvi0
<pre>
sudo tcpdump -tttt -i rvi0 src port 5223 > recv_org.log
</pre>

<ul>
<li>痛点</li>
</ul>
<p>由于APNS推送后的内容是加密的，因此无法确认发送和收到是否属于同一条，目前采用的是发送不同内容，收到的内容长度不同来区分，我这里做了个统计信息如下:</p>
<p>Payload长度|收到长度<br>|:–|:–<br>0|250<br>10|266<br>26|282<br>42|298<br>58|314<br>74|330</p>
<p>PS: 里面有规律，大家自行查找.</p>
<p><strong>另外，有发现有时推送有过来，但长度并不是预定中</strong></p>
<h3 id="统计分析"><a href="#统计分析" class="headerlink" title="统计分析"></a>统计分析</h3><p>通过send_org.log和recv_org.log对比，记录发送推送后是否在规定时间段内收到抓包信息，有则记录时间，并在最终输出report，详见统计结果.</p>
<ul>
<li>TIME - 时间段</li>
<li>INTERVAL - 发送时长</li>
<li>FROM - 推送服务器</li>
<li>TO - 手机IP</li>
<li>SEND - 发送数目</li>
<li>RECV - 收到数目</li>
<li>LOSE - 未收到数目</li>
<li>RATE - 到达率</li>
<li>AVERAGE REACH TIME - 平均到达时间</li>
<li>DETAIL - 详情</li>
</ul>
<h3 id="统计结果"><a href="#统计结果" class="headerlink" title="统计结果"></a>统计结果</h3><ul>
<li>WIFI下(Production)</li>
</ul>
<p><img src="http://7ximmr.com1.z0.glb.clouddn.com/apns-report-20160202.png" alt="image"></p>
<ul>
<li>电信3G下(Production)</li>
</ul>
<p><img src="http://7ximmr.com1.z0.glb.clouddn.com/apns-report-20160203.png" alt="image"></p>

      
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-3"><a class="nav-link" href="#统计方式"><span class="nav-number">1.</span> <span class="nav-text">统计方式</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#统计分析"><span class="nav-number">2.</span> <span class="nav-text">统计分析</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#统计结果"><span class="nav-number">3.</span> <span class="nav-text">统计结果</span></a></li></ol></div>
            

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